Is Nanyang pyrography a folk custom in Nanyang? What are its characteristics?

Pyrography, also known as bronzing and fire painting, is a traditional arts and crafts with a long history. Originated in Nanyang City, Henan Province, a famous historical and cultural city in China. Known as one of the "three treasures of Nanyang". It uses iron skewers at 300-800℃ as ghostwriters, and draws on bamboo, silk, rice paper and other materials by using carbonization principle. In the early days of liberation, Nanyang pyrography was mainly developed with pyrography chopsticks, and wooden pyrography chopsticks were made of holly medicinal wood, with excellent texture and exquisite craftsmanship. On the surface of square chopsticks, the pictures drawn by craftsmen are elegant and exquisite, which can be appreciated. It is another manifestation of China's art, so it has become a collector's favorite.